wp_blacklist_check

Source code

function wp_blacklist_check($author, $email, $url, $comment, $user_ip, $user_agent) {

	do_action('wp_blacklist_check', $author, $email, $url, $comment, $user_ip, $user_agent);



	$mod_keys = trim( get_option('blacklist_keys') );

	if ( '' == $mod_keys )

		return false; // If moderation keys are empty

	$words = explode("\n", $mod_keys );



	foreach ( (array) $words as $word ) {

		$word = trim($word);



		// Skip empty lines

		if ( empty($word) ) { continue; }



		// Do some escaping magic so that '#' chars in the

		// spam words don't break things:

		$word = preg_quote($word, '#');



		$pattern = "#$word#i";

		if (

			   preg_match($pattern, $author)

			|| preg_match($pattern, $email)

			|| preg_match($pattern, $url)

			|| preg_match($pattern, $comment)

			|| preg_match($pattern, $user_ip)

			|| preg_match($pattern, $user_agent)

		 )

			return true;

	}

	return false;

}